Microsoft to reveal the future of Windows Phone June 20 in San Francisco

Well, Windows Phone 8 announcement is widely expected in that case, with the eventual multicore chipset and high-res screens support, and the rumored common kernel with Windows 8, plus better integration with Win 8 devices.
Touch-enabled tablets, notebooks and all-in-ones announcements with Windows 8 flooded the Computex expo starting yesterday, so there will be no shortage of machines to pair the future Windows Phone 8 handsets with.
source: Microsoft